UA122679C2 - Liquid espresso concentrate - Google Patents

Abstract

Disclosed is a method of making a coffee concentrate, and a coffee concentrate obtainable by the method. The method involves primary and secondary extraction, with split tapping of the primary extract into a first and second primary draw off. The extraction is conducted under such conditions as to satisfy a minimum mass transfer Fourier number, and a minimum ratio of the extraction yield of the first primary draw-off to the extraction yield obtained in all extraction sections.

Description

Field of invention

The invention belongs to the field of coffee concentrates. In particular, the invention relates to a method of obtaining concentrated coffee extract (hereinafter - coffee concentrate) and the extract or concentrate obtained with it. More specifically, the invention relates to a coffee concentrate with improved organoleptic performance that is most similar to an espresso-based coffee beverage for a bean-to-cup espresso machine for preparing, for example, ristretto, espresso or lungo and/or milk-based beverages , for example, cappuccino or latte macchiato.

Justification of the invention

The demand for coffee concentrates for commercial and/or industrial use is increasing. A typical field of application for such liquid coffee concentrates is in coffee vending machines. Many such machines do not prepare fresh coffee extract, but add hot water to the form of industrially produced coffee extract. Accordingly , such machines dispense coffee either by reconstitution from soluble coffee particles or by diluting coffee concentrates.

The term "coffee concentrate" has a certain meaning in this field of technology, which refers to aqueous concentrates having a dry solids (dry weight) content of 15 to 55 wt. 95 (And such a dry solid substance is present in the concentrate mostly in the form of solid particles soluble in the liquid). These concentrates are sometimes called "liquid coffee concentrates". This refers to the state, usually at the ambient temperature, in which the concentrates are actually used (in the form of flowing, mostly pumpable liquids). In many cases, stable storage of such concentrates requires refrigeration and, most typically, freezing. With this in mind, coffee concentrates that are used in liquid form are often also called frozen liquid coffee concentrates. Hereinafter, the terms "coffee concentrate" and "liquid coffee concentrate" are used interchangeably, and these terms cover coffee concentrates in both liquid and frozen form.

A constant challenge in the preparation of coffee in machines, as mentioned above, which operate on the basis of coffee that is not freshly extracted, is to obtain coffee that has a sufficient similarity, especially in terms of aroma, to freshly extracted coffee. This task is even more difficult in the case of dispensing coffee of the espresso type. Espresso is a type of coffee drink that is usually brewed by passing water at a temperature of about 95"C under pressure through a coffee bed of finely ground beans. As a result of this specific processing method, a special type of coffee drink is obtained, which has a typical taste that cannot be obtained only thanks to using a specific bean, blend of beans and/or roast level It is known to be difficult to obtain a coffee that has a recognizable espresso flavor such as taste and/or smell without fresh use of a specific brewing process.

Typical developments in the manufacture of vending machines for espresso-type coffee drinks are devoted to machines that make fresh preparation of an espresso drink, for example, from roasted and ground coffee, for use in such machines. However, it is also desirable to obtain espresso, which can simply be obtained from a vending machine, in which the extraction process does not take place, but which works only on the basis of the dissolution of already existing, for example, industrially obtained, liquid coffee concentrate.

There is no liquid coffee concentrate suitable for making espresso-type coffee in the prior art.

A prior art document that refers to the production of liquid coffee concentrates is M/O 2007/043873. It describes a method by which roasted and ground coffee is subjected to double extraction, with the re-extraction being carried out at a higher temperature than the primary extraction. The described process, which includes, in particular, aroma recovery and a high water-to-coffee ratio, is suitable for the preparation of liquid concentrates having an improved coffee taste/aroma. However, the described method does not provide espresso-type coffee concentrate.

It is desirable to obtain a liquid concentrate suitable for obtaining an espresso-type coffee drink. It is also desirable to obtain such a liquid coffee concentrate in an economically justified way. A special need is to provide a liquid coffee concentrate with improved organoleptic indicators.

The essence of the invention

In order to better satisfy one or more of the above-mentioned needs, the invention provides, in one aspect, a method of preparing a coffee concentrate comprising the steps of: (510) (a) providing ground roasted coffee beans having a minimum average Martin diameter of 0.5 to With mm; (b) subjecting ground roasted coffee beans to primary extraction with water to obtain the first primary extract with an extraction factor of no more than 2; (c) decanting a second primary extract after said first primary extract; (4) subjecting the primary extracted ground roasted coffee beans to secondary extraction with water to obtain a secondary extract; (c) subjecting the second primary extract and the secondary extract to evaporation to obtain a concentrated extract having a dry solids content of 30 to 75 wt. 9Uo; (I) combining the concentrated extract with the first primary extract; (9) optional addition of water to obtain a liquid coffee concentrate having a dry solids content of 15 to 55 wt. 95, wherein the primary extraction is conducted under such conditions as to correspond to a Fourier number for mass transfer of at least 0.35, and wherein the ratio of the extraction yield of the first primary hood to the extraction yield obtained in all extraction sections is in the range of 0.15 to 1.0.

In another aspect, the invention provides a coffee concentrate containing from 15 to 55 95 dry solids, which is obtained by the above method according to the invention.

In yet another aspect, the invention relates to a coffee concentrate containing from 15 to 55 95 dry solids, characterized in that it has a flavor profile represented by the presence of 1-caffeylquinic acid (1-SOI) lactone, dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy) 2-propanone, 2-heptanone and 4-ethylguaiacol, where the calculated value of the M method model based on individual least squares discriminant analysis of said markers, as defined herein, is greater than 0.5.

Brief description of the drawings

Fig. 1 is a block diagram of one embodiment of the method according to the invention; in Fig. 2 shows superimposed spectra of ultraviolet and visible absorption ranges of chlorogenic acid and 1-caffeylquinic acid lactone (1-SOY);

Fig. C is the calibration curve of chlorogenic acid;

From Fig. 4 is a chromatogram of a time-of-flight mass spectrometry HPLC with a photodiode matrix (HPLC-MF-CHP MS) of a sample with a volume of 5 μl of a standard solution of chlorogenic acid. at a concentration of 50 μg/ml;

Fig. 5 is a time-of-flight HPLC mass spectrometry (HPLC-CHP MS) chromatogram (negative electrospray ionization mode, IE) of the chlorogenic acid standard at a concentration of 10 μg/ml of water.

Detailed description of the invention

In a broad sense, the invention is based on the prudent understanding that a liquid espresso concentrate can be produced by a method that includes primary and secondary extraction, where the primary extraction is carried out in such a way as to improve the extraction of taste/aroma, and therefore the full extraction is carried out with a conscious reduced yield of complete extraction. The latter is reflected in the ratio of the extraction yield of the first primary hood to the yield of full extraction. The first is reflected in the Fourier number for mass transfer, which will be described in more detail later in this description.

In the method according to the invention, ground roasted coffee beans are first obtained. The main types of coffee they use are washed and unwashed Arabica and Robusta beans.

Of course, you can use mixtures of both varieties. These beans can be identified by a specific geographic origin, such as Colombia, Brazil, or Indonesia.

In order to improve the espresso character of the liquid coffee concentrate, arbitrary embodiments of the invention take into account two main advantages over the roasted and ground coffee used. One is the degree and time of roasting, the second is the size of the coffee grind.

The degree of roasting can be determined in different ways. One way is to determine the color of roasted coffee beans. The method known to a person skilled in the art is based on the "Og. Iapde" colorimeter. It is better if the degree of roasting corresponds to the color measurement value from 32 to 54 according to "Og. Iapde". As one skilled in the art knows, a higher value indicates a lighter degree of roasting. Thus, the lower end of the range should correspond to the characteristics of a strong espresso, while the upper end of the range is more commensurate with the type of espresso known as "lungo" (which, when freshly brewed, is made with more water than traditional espresso). If the "Og. Gapde" colorimeter is not commercially available, an alternative method for determining the color of roasted coffee beans is the use of the "Soyogene" colorimeter (from the company Rgobai-M/ezhe mop SbSitrogt MazsPipepiarik StrN, Emmerich, Germany). When using the "Soiogene" colorimeter type ZB, the range of values according to the "Og. I apde" colorimeter from 32 to 54 corresponds to the range of values from 54 to 100. Thus, the color value according to the "Soiogene" colorimeter is equal to (73.1918-4.958647О01 )/(1--0.0188118701. - 0.00002151857011 "Op, where Ot is the color value according to the colorimeter "Og. I apde".

The degree of roasting can also be determined based on weight loss due to roasting (where roasting at higher temperatures and/or longer roasting times will cause more weight loss). As a rule, the values of degrees of roasting according to the invention, which are preferred, are from 13.0 to 18.5 wt. 95 for Arabica coffee and from 16.0 to 20 wt. 95 for robusta coffee.

It is believed that the desirable characteristics of the liquid coffee concentrate of the invention are a consequence of the use of coffee grounds of a relatively small grinding size on an industrial scale. Roasted and ground coffee beans subjected to the extraction method according to the invention have a size that corresponds to the minimum value of Martin's diameter from 0.5 to 3 mm.

Martin's diameter is the length of the bisector of the section of the irregular object in the specified direction of measurement. It is determined using the measuring system "SAM5ILENF

RA", which is based on the principle of dynamic image analysis. Behind it, the bulk material (the particle size of which must be determined) falls between the light source and the cameras. The cameras detect each particle and then digitize and process it on an attached computer.

The diameter of Martyn Khma is determined in 32 directions. The diameter of Martin 1 of a particle is the minimum value of a series of measured diameters of Khma in all directions. This description refers to the average value of the minimum diameter of Martin, which is from 0.5 to 3 mm. It is clear that not all particles are the same size. In this case, it is conventional to refer to the calculated mean particle size derived from the distribution of the measured Martin diameters (minimum value). In this description, the corresponding mean particle size using it is the above-mentioned calculated mean value of the distribution of a series of measured Martin diameters (minimum value). In other words, different particles have different diameters

Zo Martin (minimum value), and therefore the average of these minimum values is a usable parameter.

A preferred range is from at least 0.8 mm, eg at least 1.0 mm, eg at least 1.2 mm, to below 2 mm, eg below 1.9 mm, eg below 1.8 mm . In a notable embodiment, the particle range is from 1.1 to 1.9 mm, preferably from 1.6 to 1.8 mm.

Grinding size can be predetermined using the mill settings, in particular based on the distance between the two rolls. A mill with one or multiple stages can be used. The size of the grinding is adjusted using a device for measuring the size of particles of the "Satvieg" type, as mentioned above.

As is customary in the art, the roasted and ground coffee beans are extracted with water.

The term "water" in the text above and below refers to any aqueous liquid traditionally used in the preparation of coffee extracts. It can be, for example, ordinary tap water, water softened with sodium, demineralized cationic and anionic water or water condensates from evaporators (during the dehydration of coffee extracts) or their mixtures.

The first stage of extraction according to the method according to the invention includes subjecting ground roasted coffee beans to primary extraction. This extraction can be carried out in an extraction section containing one or more conventional extraction chambers or percolators.

As is known to those skilled in the art, the term "primary extraction" in the field of coffee extraction has the specific meaning of physical extraction. So, during primary extraction, water-soluble coffee components are extracted. During this primary extraction, water below 120 "C, usually between 70 and 120 "C, preferably between 85 and 9570, is usually used as the extraction liquid. Preferably, the coffee is extracted in a fixed bed chamber or percolator in an upflow or downflow or according to the principle of countercurrent extraction. As a general rule, a primary weight ratio of water to coffee beans between 2.8 and 15, preferably between 3 and 10, preferably between about 4.0 and 8.0, is used per cycle. In the method according to the invention, the cycle is mostly between 10 and 60 minutes.

The cycle time is defined as the time between connecting the percolator with fresh coffee to the primary extraction section and the time until the primary extraction section is loaded again 60 with a new percolator filled with fresh roasted and ground coffee.

Primary extraction is carried out to obtain the first primary extract with an extraction factor of at most 2, preferably at most 1.5. A draft ratio of at most 1 is preferable, and even better at a maximum of 0.7. In this description and in the claims of the invention, the term "extraction coefficient" means the ratio of the mass of the extract to the mass of dry roasted and ground coffee in the primary extraction section. In practice, this extraction ratio is determined by a compromise between, on the one hand, a sufficient degree of extraction of coffee soluble substances and aroma in the first primary extract and, on the other hand, the lowest possible volume of the first primary extract. The primary extraction factor that can be used for this substance depends on: the coarseness or degree of grinding of the roasted coffee beans used, the extraction chamber and in particular the number of percolators connected in series, the water-to-coffee ratio used, the cycle time used, the temperature of the feed water and the desired concentration of the final product, etc. The ratio of water to coffee in the primary extraction preferably ranges from 4 to 15, preferably below 10 and even better from 4 to 8.

According to the invention, during the primary extraction, the extract is extracted in two stages. That is, the primary extract is split (divided into fractions) during pouring to obtain the first (highly aromatic) and second primary extracts. Therefore, it will be understood that the primary extraction defined above in relation to steps (B) and (c) includes obtaining a first primary extract with an extraction factor of at most 2, and extracting a second primary extract after said first primary extract. As defined above, this primary extraction, i.e. the combined steps of obtaining the first and second primary extracts, is carried out under such conditions as to correspond to a Fourier number for mass transfer of at least 0.35 (which is based on the average size of the coffee grind used (the average minimum diameter of Martin ) and the residence time of the coffee in the primary extraction section and the applied extraction temperature, which affects the diffusion coefficient within the particles), as will be further defined below.

Partially extracted ground roasted coffee beans from primary extraction are additionally subjected to secondary extraction. As is known to the person skilled in the art, secondary extraction includes, among other things, thermal hydrolysis of partially extracted particles of ground roasted coffee. Thus, the components obtained during thermal hydrolysis, which are soluble in water, will be extracted from the coffee. Secondary extraction is not limited to components obtained by thermohydrolysis. Of course, also an additional amount of soluble components that existed before (primary but not yet extracted) will be extracted during the secondary extraction.

The secondary extract is obtained by secondary extraction with water or an aqueous liquid in a secondary extraction section containing one or more sequential extraction chambers. In this extraction section, the ground coffee beans are subjected to extraction at a higher extraction temperature than in the case of primary extraction, usually at a feed water temperature between 120-220"C. The first fraction of the secondary extract from the secondary extraction is optionally fed to the primary extraction chamber in in the form of liquid for extraction.The rest of the extract, the second fraction of the secondary extract obtained from the secondary extraction, is combined with the second primary extract, optionally after the evaporation step.

Primary and secondary extraction can be carried out in traditional extraction chambers. In the best embodiment, both primary and secondary extractions are carried out in a percolator or percolators located in series. In particular, secondary extraction is preferably carried out in at least 2, and preferably at least 4 percolators connected in series. As a rule, the number of percolators used in the primary extraction section is at least 0.5, which means that for 50 95 of the duration of the cycle 1 percolator is connected to the primary extraction section. Preferably, at least 1 or 2 percolators are connected to the primary extraction section. Taking into account the residence time of the coffee derived from the size of the coffee grind and the Fourier number for the mass transfer, the specialist will be able to determine the appropriate number of percolators depending on the selected cycle duration.

The first primary extract has a very high quality in terms of organoleptic indicators and is highly concentrated; preferably, it is directly cooled to a maximum of 25 "C, but better to a maximum of 10 "C, for example, to 0 "C, and best to -2 "C. It is better if the primary extract is stored in an inert gas atmosphere, for example, in a nitrogen atmosphere.

The invention also includes subjecting the second primary extract and the secondary extract to evaporation to obtain a concentrated extract. Evaporation can be carried out separately for both extracts, after which the concentrated extracts are combined. Better,

if the second primary extract and the secondary extract are first combined and then evaporated.

The second extract of the primary extract is concentrated, usually together with the secondary extract, to a dry solid content between 30 and 75 95, preferably between 35 and 65 95, best between 40 and 60 Vol.

Finally, the concentrated extract obtained from the second primary extract and the secondary extract are combined with the first primary extract to produce a liquid coffee concentrate. To obtain the desired concentration of coffee concentrate, water may be added to adjust the dry solids content to obtain a coffee concentrate with a dry solids content of 15 to 55 wt. at.

In various interesting embodiments of the method according to the invention, the variables of the method are selected as follows.

Roasting: degree of roasting (Og. IGapde) from 32 (darker) to 54 (lighter); roasting in the range from 13 (lighter) to 20 (darker); frying time: from 7.5 to minutes, preferably 8-10 minutes. For types of espresso coffee concentrates (as opposed to lungos), preference is given to the degree of roasting of Arabica, which is more than 1595 15 roasts.

Coffee extraction: average size of coffee grind (minimum value of Martin's diameter) in the range from 0.5 to 3.0 mm, better from 1.4 to 1.9 mm. Total extract yield of soluble coffee particles (U TE): in the range from 25 to 45 95, better from 30 to 35 95. First yield of soluble particles of the primary extract (U-PET): in the range from 7.5 to 25 95, better from 10 to 20 95. Ratio

M RE! to MU TE: in the range from 0.15 to 1.0, preferably from 0.20 to 0.60, better from 0.30 to 0.40.

Fourier number for primary extraction: preferably 0.35 to 3.0, preferably 0.5 to 1.5, most preferably 0.5 to 1.0.

Aroma recovery: optional partial aroma recovery from the second primary extract by evaporation: in the range of 0 to 60 95; better (if conducted) from 20 to 40 95.

The content of dry matter in the concentrate after evaporation of coffee extracts: in the range from 30 to 75 Uo, better from 40 to 60 95.

The final dry solids content of coffee concentrates that can be obtained according to the invention is from 15 to 55 wt. 95, better from 25 to 35 kg. About.

The embodiment of the method according to the invention is shown in the block diagram in Fig. 1. It will be understood that the invention is not limited to the particular circuit shown.

According to the invention, an additional measure is used to obtain a liquid coffee concentrate that has the characteristics of espresso. For this, the primary extraction is carried out in such a way as to correspond to a Fourier number for mass transfer of at least 0.35, preferably from 0.35 to 3.0, and the ratio of the yield obtained in the first primary extract to the yield obtained in the complete extraction, from 0.20 to 0.60 and preferably from 0.3 to 0.4.

Meau's Fourier number is represented by the following formula (I)

Meo-O. 1 / (Ar)? (And) where

Meo Fourier number for mass transfer inside particles;

Contact time for mass transfer (5); it is determined by the residence time of ground coffee in the primary extraction section;

Вr average particle radius (m); it is derived from the minimum value of the average diameter

Martin, divided by 2;

Or diffusion coefficient inside the particles for solutions in the coffee matrix (m2/s). The value of Yu is usually 2.109 me/s for extraction at a temperature of 957C. This value will be lower or higher, respectively, at lower or higher extraction temperatures.

These values are known to those skilled in the art, and were derived from finite volume bath extraction experiments of coffee of different origins, roasted under different conditions and extracted at different coffee grind sizes. When using the physical diffusion model based on the value of the constant diffusion coefficient, the diffusion coefficient can be derived for extraction experiments in a bath of finite volume: 80 | 1A5ELO 77796 | yuyu 2lovLO

The diffusion coefficient for other temperatures can be determined by interpolation using the Arrhenius equation (II) for the dependence of the diffusion coefficient on temperature.

(Position) p-rute LU about (1) where 36.3 kJ/mol can be used for the activation energy Ez

T: absolute temperature (K)

BA: ideal gas constant 8.315 Joule/Kelvin-1 mol-1

As a result, the applied Fourier number for mass transfer is a dimensionless value of the degree of extraction of soluble coffee particles from the coffee matrix.

A person skilled in the art, after familiarizing himself with the range that must be set for the Fourier number for mass transfer, can easily adapt the parameters of the method accordingly. In particular, the limits given for the Mego value directly direct the specialist to apply the appropriate limits for the combinations of the coffee grind sizes used (the average minimum value of Martin's diameter), and the residence time of the coffee in the primary extraction section and the diffusion coefficient within the particles depend on the applied extraction temperature. One skilled in the art will understand that in a coffee extraction method, adjusting one method parameter can affect another method parameter. Accordingly, this disclosure provides a technique based on setting a combination of method parameters, rather than individually setting these parameters separately.

The above guideline is further illustrated by examples in Tables 4, 5 and 6. These tables give, for three sets of extraction conditions, the Fourier number for mass transfer for a range of particle size combinations (horizontal axis, i.e. the plot columns labeled as mean minimum the value of Martin's diameter) and the residence time of ground coffee in the primary extraction section (vertical axis, i.e. rows of the table, indicated in minutes). To calculate the Fourier number, the residence time is first converted to seconds, which is the applicable time unit in formula (I) above. A set of conditions applicable to each of

Tables 4, 5 and 6, indicated in Table 1 below.

Table 1 (Temperaturass). /////////777717с7177171711111701Ї711111718011171111111195

As mentioned above, another technical measure according to the invention is to carry out full extraction to reduce the yield of full extraction. This is reflected in the ratio of the yield obtained during the first primary extraction to the yield obtained during the complete extraction, which is set in the range from 0.15 to 1.0, preferably from 0.20 to 0.60. This relatively high ratio is contrary to common practice in the art.

As is well known to those skilled in the art, the term "extract yield" as used in the context of a process such as extraction actually refers to the ratio of the amount of soluble coffee solids extracted from the roasted coffee divided by the amount of roasted coffee being extracted, which the skilled artisan is usually able to determine (which differs from output, for example, in the process of chemical synthesis, where this term usually refers to the result to be achieved).

The yield of the extract is defined as the percentage ratio of the mass of extracted soluble coffee solids to the mass unit of dry roasted coffee. This is calculated according to the formula (II) below, with the following entered data: - load on the chamber of roasted and ground coffee (ts) - adjusted for moisture content (ohm); - mass of coffee extract (Me), extracted from the coffee chamber; - content of soluble solids (Ce) in coffee extract.

The content of soluble solids is preferably determined using the refractive index. The content of solids can be deduced from the calibration curve: sia M. li

EC - NO - and by NO

An appropriate combination of settings for the Fourier number for mass transfer and for the extract yield ratio serves to improve the quality of the primary extraction and (c;

increasing its contribution to the total extract. Unexpectedly, when grinding coffee the size is less than

With mm, especially less than 2 mm, a coffee concentrate with a more espresso-like character is obtained, although traditional espresso brewing was not carried out.

Accordingly, the invention also relates to the coffee concentrate obtained by the method described above, in any and all of its embodiments.

In addition, the desired aroma of the coffee concentrates according to the invention is unexpectedly reflected in the espresso aroma markers manifested in the product obtained using the method according to the invention.

Without wishing to be bound by theory, the inventors believe that they have identified a set of flavor markers that reflect the unique nature of the espresso-type coffee concentrate of the invention.

This kit consists of one marker that can be identified and quantified by LC-MS (Liquid Chromatography - Mass Spectrometry) and five markers that can be identified by GC-MS (Gas Chromatography - Mass Spectrometry).

A marker suitable for identification by LC-MS is 1-caffeylquinic acid lactone (1-SOI). The structure of 1-SOY is given in Formula (IM) below. o 9 o ron on nn no (IM)

Markers suitable for identification by GC-MS are dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy) 2-propanone, 2-heptanone, and 4-ethylguaiacol. The aroma profile according to the invention is characterized quantitatively, as will be explained below.

Analytical methods

Obtaining a sample

115 g of coffee drink was obtained by dosing the indicated amount of cooled coffee concentrates at a temperature of 6-41 "C into a small bspoy flask, which was diluted with hot water at a temperature of 85--14 "C to a soluble solids content of exactly 1.695. After adding the hot water, the bspoy flask was immediately capped and cooled in an ice bath. The cooled coffee drink was homogenized by gentle shaking. Before analysis, the coffee drink was stored in a refrigerator at a temperature of 8-1 °C.

Co) Determination of 1-caffeylquinic acid lactone (1-СО1.)

Coffee caffeic acid lactones are known as sensory-active compounds associated with a mild and pleasant bitter coffee taste. Coffee lactones were detected and identified using high-performance liquid chromatography (HPLC) coupled with photodiode array (MF) detection and high-performance quadrupole time-of-flight mass spectrometry (MS). All components of HPLC-MF-MS were obtained from UUaieg5

Spgotaioaharpu V.M. (Etten-Leur, the Netherlands). The retention time on the column used and the conditions of the solvent system are compatible in the presence of caffeic acid lactones, see Yue

Moz eyi a!., 2007, Maishige Rgoioso!5 2, 778-791.

The observed high absorption on the photodiode array (MP) detector at 324 nm would be compatible with the observation according to Frank et al. (EgapK ei ai., y). Adgis EBosa

Spent 2008, 56, 9581-9585). Based on the fragmentation spectrum (see the formulas below, marked (M)-(IX)), obtained by Fourier transform mass spectrometry (FFT) using the apparatus

IHTO-Ogtbiigar (Tnegto Ipvzigitepiv, Breda, The Netherlands) in full-range scanning and at a scanning resolution of 70000 (PSHPV), data provided by Van der Hooft et al. (Map adeg Nooyi vy a!., 2012,

Meiaroiotisv 8: 691-703), it can be confirmed that these are lactones of caffeylquinic acid by the quasimolecular ion IM-NI at m/z 335.0774 and characteristic fragments at m/z 135.045, 161.024 and 179.035. Presence of fragment at m/z 173.0455 with elemental composition

С7НеО5 agrees well with the quinic acid lactone fragment of formula (IX) and is very likely when the caffeic acid moiety is attached to the 1-position of the quinic acid lactone due to easy cleavage of this moiety from 1-caffeylquinic acid (1-COA, exact m/z ratio ( M-NI is 335.0774).

With, - with kN

Church Dormuna: Se

Exact mass 133 (M) o. in o in them what he Ge)

Sign language: DREAMS Sign language: SAD

Exact mass of 1 KU Liquid mass of KI (M Ya); o o o no, uch i fi ke: day F no on lk vy i Khivical formula: SVO sip iaschna ma her yh

Excellent mass fragments of excellent (1-SOI) lactone of 1-caffeylquinic acid are present in liquid coffee. The relative high excess of m/z 173.0455 in the points of the MS/MS spectrum indicates 1-caffeylquinic acid lactone. The easy cleavage of this lactone moiety is in good agreement with 1-SOA.

The observed MS/MS fragments correspond to Jaiswal et al. (daibzula! ei a. Roy Nezvagsp

Ipteptaiiopai! 2014, 61, 214-227).

Quantitative calculation of 1-caffeylquinic acid lactone (1-СО1)

30 coffee drinks were prepared according to the invention and according to the prior art as indicated above. Each coffee drink was filtered through a Teflon filter with a thickness of 0.45 μm. All HPLC-MF chromatographic conditions, including HPLC, column type and temperature, as well as eluent gradient, are as described in (HIT11); used time-of-flight mass spectrometry Zupari 21 OO (UMaiet5, Etten-Leur, the Netherlands) in the mode of negative ionization by electrospraying with determination of masses in the range of mass to charge ratio (m/z) 90-1500. Since the absorption spectrum of 1-SOI is similar to the absorption spectrum of chlorogenic acid (Fig. 2), chlorogenic acid was used as a standard to quantify the level of 1-SOI. Chlorogenic acid (3-СС4А), SieNivO", registration number CA5 327-97-9, was obtained from bidt (order number C3878). The standard was dissolved in quality water

MIISHO in a working solution of 1000 μg/ml (52.82 mmol using a molecular weight of 354.31). The absorbance of a 100-fold dilution of this stock solution, i.e. read as pure compared to water, at 324 nm (Azga) was 0.437. When using the molar absorption coefficient of 18400 M" cm" according to Trog et al. (Ttody eyi ai, 1984. Te Apaiuvi, 109, 263-266) the actual concentration of this COSlA solution was 23.75 μmol. Therefore, the purity of the base solution was 84.16 95. After that, the base solution was diluted in MIIPO to concentrations ranging from 0 to 50 μg/ml. The sample of the highest concentration in the mass system

From HPLC spectrometry with a photodiode matrix (HPLC-MF-MS) (Fig. 4) gave a large elution at the peak at 14.4 minutes, which corresponded to 3-C(SA (Moso 5, vii a!., 2006. Riapi Rpuzioioadu 141 , 1205-18), as well as a slight elution at the peak at 17.6 minutes, which corresponded to 4-ССА (Moso et al., 2006); other peaks of the photodiode array or mass spectrometry were not detected. After the introduction of the chlorogenic acid sample into stock solution of 10 μg/mL or less, the chromatograms at 324 nm showed the elution of 4 peaks at retention times of 10.2, 14.4, 15.2, and 17.5 minutes, respectively (Figure 5). All these 4 peaks were identified as isomers of chlorogenic acid on the basis of both the specific exact mass of the parent ions (M-NI - 353.08) and their (internal) fragment of quinic acid,

IM-NO - 191.05. Since it is known that SOZAs can isomerize in aqueous solutions (Hie S, Yei Ai., 2011, 9. Addis. osa Spec. 59 (20), 11078-11087), the sum of the areas of these 4 isomers of chlorogenic acid at 324 nm was used to construct calibration curve of chlorogenic acid (Fig. 3). After that, the areas of the HPLC-MF peaks of 1-SOI at 324 nm (1.6 95 dry matter) were calculated, and the level of the marker compound 1-SOI was expressed in μg equivalents of chlorogenic acid, corrected for its impurities, per kg of soluble solids of coffee concentrate.

In one interesting embodiment, the content of 1-SOY is at least 510 mg, in another interesting embodiment, the content is 1-20. is at least 590 mg per kg dry solids.

In the above Fig. 4 shows the chromatogram of the time-of-flight mass spectrometry HPLC with a photodiode matrix (HPLC-MF-CHP MS) of a sample with a volume of 5 μl of a standard solution of chlorogenic acid at a concentration of 50 μg/ml to check the purity of the calibration solution used in the quantitative analysis of 1-SOI. Upper panel (blue line): absorbance at 324 nm on a photodiode array (MF) detector; lower panel (red line): the intensity of the base peaks (BPS) of the time-of-flight mass detector (m/z range 90-1500) in the negative mode of ionization by electrospray (IE). The difference in retention time between both detectors for one compound peak (0.065 min) is a consequence of their physical distance in the analytical system.

Elution at the main peak at 14.35 minutes of retention corresponds to 3-СС1А; isomer area 4-

SOA eluting at 17.52 min. is 3.4 95 square 3-C(A.

In the above-mentioned Fig. 5 shows the MS time-of-flight HPLC chromatogram (negative electrospray ionization mode, IE) of the chlorogenic acid standard at a concentration of 10 μg/ml of water, which showed 4 chromatographic peaks. Their exact mass m/z 353.08, i.e. caffeylquinic acid (blue line) and their (internal) fragment m/z 191.05, i.e. quinic acid fragment (red line) indicate that all these 4 peaks are isomers of chlorogenic acid Accordingly, the area of each HPLC-MF isomeric peak detected at 324 nm using HPLC-MF was combined and added to calculate the total area of chlorogenic acid per standard concentration (see Fig. 3).

Next, the invention will be further explained with reference to the following non-limiting examples.

Selection and identification of GC-MS markers

Exactly 1 ml of each coffee drink (1.6 95 dry matter) was pipetted, 2 replicates per sample, into a 10 ml glass tube (Veschieg, Amstelveen, The Netherlands) containing 0.8 g of solid SaSi» The tubes were immediately crimped lid with a 20 mm silicone/teflon membrane (Ipiegosiepse, Breda, The Netherlands), mixed and dispersed using ultrasound for 10 min. in an ultrasonic bath at room temperature.

Volatile substances in the equilibrium vapor phase of coffee were analyzed using solid phase microextraction (SFME) combined with gas chromatography-mass spectrometry (GC-MS), essentially as described by Tykunov et al. (Tikipom ei aI. 2005 Riapi

Rpuzioiodu 139, 1125 - 1137). Briefly, coffee volatiles present in the equilibrium vapor phase were automatically extracted using a 65 μm polydimethylsiloxane-divinylbenzene TFME fiber (Zireiso, USA) for 20 min. with continuous shaking at a temperature of 50 "С, using a SotriRai autosampler (STO Ipvipitepiv). The TFME fiber was inserted into a GC sample introduction device (Rizope 8000,

Eivopv Ipsigitepov), and the compounds were desorbed from the fiber at a temperature of 250 "C for 1 min. and separated on a HP-5 capillary column (50 m x 0.32 mm, film thickness 1.05 μm; Nemei

RasKaga) with helium (37 kPa) as a carrier gas. The GC oven was programmed for 2 min. at a temperature of 45 °C with a subsequent linear increase of 5 °C/min to 250 °C, and this temperature was maintained for 5 min. The complete duration of the cycle, including the cooling of the furnace, was 60 min.

The mass spectrum of volatile compounds was determined at 70 eV and recorded in the range from 35 to 400 mass/charge (m/z) using an electron impact mass spectrometer MO800 (Rizop5

Ipvigitepov). Chromatographic and mass spectral data were extracted in a non-targeted manner (Tykunov et al. - TiKipom eyi ai, 2005, Riapi Rpuzioiodu 139, 1125 - 1137) using the Meiaiidp software, which can be freely downloaded from the mumlu website. teiaiidp.pi. The isolated mass signals obtained from the same compound were grouped into so-called reconstructed metabolites using M5Sivi software (m/mlu.teiaiidp.pi) based on their similarities across samples in both chromatographic behavior and inter-sample variation as described Tykunov

Y.M. etc. (TiKkypom U.M. eyi ai., 2012, MeiaroIotisv 8, 714-718). Thus, a total of 368 clusters were obtained. The intensity value of each cluster was averaged over two replicates per coffee sample. because After that, the clusters were submitted for discriminant analysis of individual least squares (AD-

ONK) after the 0910 transformation and scaling of the variation of the units of their intensity signals using the Shopvstatbriei X software, version 10.3, from

SAMO, Meadge MoiIdaie 8, Oslo, Norway. The most important discriminating compounds were selected using the values of the regression coefficient P. The hypothetical identity of each selected compound was checked manually using the high correspondence of both their mass spectrum (compatibility coefficient »800) and retention index (difference «20 units) to compounds, about which were reported in the MIZTO8 library, as well as in the internal library of volatile compounds.

The result of this was the set of 5 discriminatory GC-MS markers mentioned above.

ONC model based on GC-MS markers and LC-MS marker

The measured values for this variety of 6 discriminatory markers (5 identified

TFME-GC-MS markers plus the quantified LC-MS marker 1-SOI) were submitted to individual least squares discriminant analysis (SLC) after /Ioiod10-transformation and scaling of unit variation of their intensity signals using Opzstatrbieg X software, version 10.3 , by SAMO, Meage MoiIdaie 8, Oslo, Norway. This gave the following linear equation of the ONK model:

M way - Vo

Vi" 10910 (Хх) same

B2" 10910(X2) w

Vz" 10910(Хз3) w

Va" 0910(Kha) same

B5 7" 10910(Х5) --

Ve" 0d10 (min)

Raw regression coefficients

Vo - -0.6508

A: - -0.4480

B2 - -0.3870

Vz- -0.2355

Va - -0.5682

B5 - -0.08586

Koo) Ve - - 0.8294

Chi: peak height of dimethyl disulfide per ml 1.6 wt. I have a drink

X2: peak height furfuryl alcohol per ml 1.6 wt. Oh drink

Xz: peak height of 1-(acetyloxy) 2-propanone per ml 1.6 wt. Oh drink

Ha: peak height of 2-heptanone per ml 1.6 wt. 96 drinks

Min: peak height of 4-ethylguaiacol per ml 1.6 wt. 6 drinks

Min: mg of 1-SOY as chlorogenic acid equivalent per kg of dry matter.

For a specific method, the specified 6 markers can be measured as described above. After

Io910-transformation obtained measurement values were entered into the above linear equation.

The value obtained in the method above 0.5 clearly indicates liquid coffee concentrates according to the invention.

Method In the ONK model, it is based on 5 identified GC-MS markers and 1 calculated LC-MS marker of 1-SOI, in the M method model, each GC-MS marker is measured as a peak height per ml of 1.6 wt. 9 o drink.

Accordingly, the invention also relates to a coffee concentrate containing from 15 to 55 95 dry solids, characterized in that it has a flavor profile represented by the presence of 1-SOY, dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy) 2-propanone, of 2-heptanone and 4-ethylguaiacol, where the value of method B, based on the discriminant analysis of individual least squares of the mentioned markers, as defined below, is higher than 0.5, preferably 0.55, most preferably 0.6.

The measured GC-MS peak heights in a specific product are highly dependent on the GC equipment

MS, which is used for analysis, but the relationship between the peak heights of the selected markers

GC-MeS in a particular coffee will not change when using other GC-MS equipment.

Accordingly, it is preferred to use the ONK model method, which is independent of the used GC-MS equipment. For this, 5 selected GC-MS markers can be quantitatively calculated in terms of mass concentration of a specific GC-MS marker per kg of dry coffee substance. After quantification of all selected GC-MS markers, the regression coefficients can be recalculated. This may have an effect on the regression coefficient of VO (as a result of the influence of the equipment, but without the influence of coffee), but will have a small or very limited effect on the value of the regression coefficient of VI, B2,..., B5, since the relationship of 5 markers GC- MS in a specific coffee is not changed after quantification.

The aforementioned quantitative calculation was carried out as described below.

Confirmation of the identity of GC-MS markers

Authentic standards of hypothetically annotated markers were purchased from Bidta/Aliagisn or Rika companies: dimethyl disulfide from RiKa (code 40221; purity »98 95), furfuryl alcohol from zZidta/Aiagsa (code 185930; purity 98 95), 1-(acetoxy)2- propanone in RiiKa (code 00803; purity 98 uv), 2-heptanone in b5idta/liagisa (code 537683; purity "99 95) and 4-ethylguaiacol in Zidta/Aiagsa (code M/243604; purity "98 95). The compounds were introduced either individually or added to the mixture of all types of coffee and analyzed by TFME - GC-MS as described above. The identity of each marker was unequivocally established by selecting their IEU-MS spectra and retention time.

Construction of calibration curves of GC-MS markers

The compounds were dissolved in ethanol in base solutions of 5 mg/ml and additionally diluted in ethanol in 5 working solutions, including ethanol-biaps (concentration 0), in the concentration range: dimethyl disulfide 0-1000 ng/ml, furfuryl alcohol 0-7500 ng/ml, 1-(acetoxy)2-propanone 0-1000 ng/ml, 2-heptanone 0-1000 ng/ml and 4-ethylguaiacol 0-15000 ng/ml ethanol. Exactly 10 μl of the working solution was added to 1 ml of coffee drink from 1.695 dry matter, prepared from spray-dried agglomerated coffee granules YuOime Edrepiv 1753 Sopiipepia! Siavzvis

Visn Roavi (Juoime Edbepv Rgoitezviopa! OK) before analyzing the vapor phase over the liquid.

Vapor phase analysis of coffee and standards; quantification of markers

Exactly 1 ml of each coffee drink (1.695 dry matter) was pipetted into a 10 ml glass tube containing 0.25 g of solid Masi. The tubes were immediately sealed with a crimp cap, mixed and sonicated for 10 min. in an ultrasonic bath as described above. Volatiles in the vapor phase above the coffee were sequentially trapped using TFME and analyzed by GC-MS (TPEGTO) as described above.

The obtained GC-MS peak areas were integrated using the Oshtsap Vhom/zeg module of the Hsairig software (Tpepto). The following masses were chosen for integration of the peaks: dimethyl disulfide mz 94, furfuryl alcohol mz 98, 1-(acetoxy)2-propanone m3z 43, 2-heptanone mz 58 and 4-ethylguaiacol mz 122. Linear calibration curves of standards (НВ? » 0 ,97) calculated based on 3 of their concentration series added to the reference coffee, after correction for the ethanol-reaps of this reference coffee. After that, the marker levels were calculated

Of the compounds in coffee and expressed in ng per ml of the reference coffee drink or calculated in mg per kg of soluble coffee solids.

The reference coffee was prepared at a concentration of 1.6 IU of dry matter per ml of drink by dissolving 0.64 g of dry coffee powder in 39.36 g of water at a temperature of 85 °C.

The reference coffee was granules of spray-dried agglomerated instant coffee

Boje Edbrepzv 1753 "Continental classic rich roasted" (Juoime Edregiv Rgoiezziopai

K). This instant coffee was used to calibrate the concentration of 5 GC-MS markers.

Instant coffee is obtained as follows: extraction of lightly roasted (roasting color value level 55 for "Og. apde" or 101 for "Soyogene" and roasting time 5:30 min.) coarsely ground 10095 robusta coffee (4.0 mm) with an extraction yield of 5195 Extraction conditions: 5.5 percolators in cascade, cycle duration 27 min., extraction ratio 4.0 kg/kg, feed water temperature 165 "С, position of the intermediate cooler between the 1st and 2nd percolator (1st percolator - percolator with freshly roasted ground coffee.) Aroma recovery was not applied prior to evaporation of the strained coffee extract and dehydration was applied using a multiphase ascending film evaporator to a final soluble solids content of 4095. The unflavored coffee concentrate was lyophilized and agglomerated and packaged in a sealed 750 g tin the bank

Measured values of a subset of 5 GC-MS markers and 1 LC-MS marker of the invention, as described above, of all quantified discriminant markers (the above-mentioned TFME-GC-MS quantified markers (1)-(5), plus the above-mentioned quant. calculated marker X-

MS 1-SOI (6)) submitted for discriminant analysis of individual least squares (AD-ONC) after Iosd10-transformation of concentrations (expressed as mg/kg of soluble coffee solids) and scaling of the unit variance of their concentrations, using Op5sgatbrieg X software , version 10.3 by SAMO, Meige MoiYidaie 8, Oslo,

Norway. This gave the following linear equation of the AD-ONK model:

Yasnoeib s ob b Cheri v bo Che v dv Chen v bo Chassa be i S V Chavsu

Thus, the Vo-ie coefficients in the equation have the values indicated in Table 2 below.

Table 2

Vo 77777771 Segment 77777771 17 -5.8378660

VYAGHAMSI 0 Furfuryl alcohol///77777777777 C 03100744

VYAGHAMSI 0 1-(acetyloxyb2o-propanone.///// |C3 02844013

VAGHMS 77777771 2gleptanone/////77777777777777777|C4 -0.1942126

VaGHMS 77771111 4ethylltvaiacol///////77777777777 C -0.1253055

Mo acid (3-COA) (СА5-327-97-9 "

C in the equation means the concentration of the corresponding compounds (1) - (6) in mg per kg of soluble coffee solids.

A coffee concentrate of the invention described above, which can be prepared by the method of the invention described above, which contains from 15 to 55 95 dry solids, can thus equally be characterized as having a flavor profile represented by the presence of 1-SOY , dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy) 2-propanone, 2-heptanone and 4-ethylguaiacol, where the value of method 7 based on individual least squares discriminant analysis of the mentioned markers, as defined below, is higher than 0.5, better higher than 0.55, preferably higher than 0.6. Even better, if this value is higher than 0.65.

As one skilled in the art will appreciate, the above described quantification of the identified 5 aroma markers

GC-MS, present in the flavor profile of the mentioned coffee concentrate, also makes it possible to establish a regular amount of these aroma components. This refers to the sum of the concentrations of the above-mentioned GC-MS markers (1) - (5), which is higher than 2850 mg/kg of soluble solids. For the above higher flavor preferences, this sum value is preferably greater than 3000 mg flavor/kg yr, for example greater than 3150 mg flavor/kg yr, for example greater than 3300 mg flavor/kg yr. yr., for example, more than 3450 mg aroma/kg yr, for example, more than 3600 mg aroma/kg yr.

Example 1

The principle of the present invention is demonstrated on an industrial scale in a diffusion battery of a series of coffee extractors with a fixed layer. A coffee blend consisting of 60 95 washed Arabica coffee beans and 4095 unwashed coffee beans was roasted in a batch roaster for 9:00 minutes with the roasting air temperature decreasing. A degree of roasting was applied, which resulted in 16.5 wt. 9". The moisture content of roasted coffee beans was 2.9 wt. 95.

Just prior to coffee extraction, the roasted coffee beans were ground to an average grind size of 1.9 mm (according to the Hma-min calculation definition above).

From the Chamber, 10095 was loaded with ground coffee, the ground coffee was not moistened before extraction.

A primary extraction was performed with counter-sodium softened water, in which the nutrient water was introduced into the percolator in an upflow flow at a feed temperature of 9570. The residence time of the coffee in the primary extraction section was 53 minutes, a water to coffee ratio of 6.0 was used with a back pressure of 2 Bar under during the extrusion of saturated air and coffee gas from the percolator, after the release of the gas, the back pressure was raised to 4 Bar during the collection of the primary extract from the percolator. The Fourier number for mass transfer of primary extraction was 0.70.

The primary extract was divided into fractions in the first primary extraction with a extraction ratio of 0.60. A highly aromatic first primary extract with a soluble solids content of 19.195 was obtained and cooled to below 25°C prior to storage in the weighing tank. The first primary extract was cooled to below 6°C on discharge from the weighing tank. The residual low aromatic primary extract was collected in a storage tank as a second primary extract with a soluble solids content of 5.2 wt. 95 and cooled to below 25 °C before storage in the weighing tank.

Partially extracted ground coffee was subjected to high-temperature extraction in the secondary section of the diffusion battery. Condensate from the evaporator was reused as feed water for secondary extraction, this feed water was introduced into the percolator at a temperature of 158 "C. The residence time of the coffee in the secondary section of partially extracted ground coffee was 145 minutes, and a secondary hood of 5.0 with a back pressure of 6 Bar was used .The soluble solids content of the second hood was low at 2.3 wt. 95. After extraction, the spent coffee was released for energy recovery. The total yield of the roasted ground coffee extract was 32 95.

The aroma was recovered from the second primary hood by counterflow atmospheric pressure evaporation at a temperature of 100°C. Only 25595 of the entire second primary hood was subjected to aroma recovery in a column with static internals. The aroma-laden vapor was condensed in a single-stage condenser at a temperature of 6°C . The reconstituted aroma concentrate was mixed with the first primary extract.

The second primary extract was mixed with the second secondary extract to a mass balanced based on actual extract yield, which gave a soluble solids content of 3.4 wt. 95. This mixture was dehydrated by evaporation to a final soluble solids content of 48 wt. 95. The effluent from the evaporator was cooled to 20 °C.

The highly aromatic primary extract containing the reduced aroma was mixed immediately after evaporation with the effluent of the low aromatic coffee concentrate from the evaporator. A final coffee concentrate with a soluble solids content of at least 30 wt was obtained. 95, which was cooled to 6 "С.

Insoluble coffee particles present in the final coffee concentrate were separated. After cleaning, the final product was packed in a "bag in a box" package with a gear pump, described, for example, in UMO 2014/003570. Coffee "bags in a box" were frozen in freezer tunnels to a maximum temperature of -18 70.

Coffee concentrates were evaluated by a group of randomly selected consumers. The results of the group evaluation are as follows: o espresso: the same preference and the same organoleptic profile (with the exception of a less intense smell) as coffee "coffee bean in a cup" (rbeap-o-cheese) of the Rio/la Ogo Eoga brand from the 5spagheg RYAO 500 machine; o lungo: higher preference and a different organoleptic profile (softer and more delicate), like the coffee "coffee bean in a cup" of the Ria brand; o cappuccino: the same preference and the same organoleptic profile as coffee "coffee bean in a cup" brand Ria;7a a4'Ogo Rogla from the Zspageg RO 500 machine and skimmed milk.

Example 2

Coffee concentrates were obtained according to the procedure of Example 1 with specific parameters as indicated in Table 3 below. The following coffee mixture was used: 60 wt. In washed Arabica; 40 95 of unwashed Arabica.

The 1-SOY content was 559 mg per kg dry solids for the liquid concentrate prepared according to Example 2A and 622 mg per kg dry solids for the liquid concentrate prepared according to Example 2B.

The calculated value of the method B model based on individual least squares discriminant analysis of the six identified flavor markers as defined herein for

Examples 2A and 2B are as follows: 2A: 0.827 28: 0.682

Example C (reference example)

A coffee concentrate was obtained according to the method described in MUO 2007/043873, with a coffee mixture almost identical to that of Example 2 (65 wt. 95 washed Arabica; 35 95 unwashed Arabica), and the specific parameters indicated below in Table 3. The size of the coffee grinding (the minimum value of Martin's diameter, as indicated in the description) was 3.6 mm.

The Fourier number for mass transfer was 0.20. The ratio of the yield obtained from the first primary extraction to the yield obtained from the complete extraction was 13.9.

The content of 1-SOY was 375 mg per kg of dry solid matter for the resulting liquid concentrate. The calculated value of the model of method Y based on the individual least squares discriminant analysis of the six identified flavor markers, as defined herein, was 0.329.

Table C

With (previous (Time roasting (hvsec).//////// 7777/9001 17111900 1777530

Particle size (minimum value nyu shishishshshshshi (Primary extraction (PE) //:///Ї 77771111 sratio of water to coffee (kg) | 60 7 | 60 | 60 softened ' ' with sodium and sodium with sodium . extract of the 1st extraction with the primary extraction (kg/k) | 7771/1062 | 060 1777047 substances) (Secondary extraction (SE) /:/ ОЙ 77777111 sIautorin extraction (yuig)Й 11777110 11111011 (Recovery of aroma by co-evaporation.о///| 7 /Й7777777і11111111

Evaporationd//-/:777711111111Ї1111111111111111Ї11111111111111 - Content of nutrient dry matter (95 content - Final content of soluble solids

End product//////77777771111111111Ї11111111111111Ї11111111111111 - Final content of soluble solids

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Claims (18)

FORMULA OF THE INVENTION 1. A method of obtaining coffee concentrate, which includes stages: providing ground roasted coffee beans with an average minimum value of the Martin diameter from 0.5 to 3 mm, subjecting the ground roasted coffee beans to primary extraction with water, and said primary extraction includes obtaining the first primary extract with a coefficient hoods at most 2 and decanting a second primary extract after said first primary extract, subjecting the primary extracted ground roasted coffee beans to secondary extraction with water to obtain a secondary extract, subjecting the second primary extract and the secondary extract to evaporation to obtain a concentrated extract having a dry solids content of 30 to 75 mass 95, the combination of the concentrated extract with the first primary extract to obtain a liquid coffee concentrate with a dry solids content of 15 to 55 wt. 96, wherein the primary extraction is conducted under such conditions as to correspond to a Fourier number for mass transfer of at least 0.35, and wherein the ratio of the extraction yield of the first primary hood to the extraction yield obtained in all extraction sections is between 0.15 and 1.0, and where the roasting time is from 7.5 to 15 min. 2. The method according to claim 1, where the minimum value of the Martin diameter of ground roasted coffee beans is less than 2.0 mm. C. The method according to claim 2, wherein the minimum average value of the Martin diameter of the ground roasted coffee beans is from 1.4 to 1.9 mm, preferably from 1.6 to 1.8 mm. 4. The method according to any of the previous items, wherein the coffee beans have a degree of roasting corresponding to roasting from 13 to 20 95. 5. The method according to any of the previous items, wherein the frying time is from 8 to 10 minutes. 6. The method according to any of the previous items, where the yield of complete extraction (U TE) is from 25 to 45 95, preferably from 30 to 35 95. 7. The method according to any of the previous clauses, where the first yield of primary drained soluble solids (U-PE1) is from 7.5 to 25 95, preferably from 10 to 20 95. 8. The method according to any of the previous items, where the ratio of U PE to U TE is from 0.20 to 0.60, preferably from 0.30 to 0.40. 9. The method according to any of the previous items, where the Fourier number for primary extraction is from 0.5 to 1.5, preferably from 0.5 to 1.0. 10. The method according to any of the previous points, where the aroma is restored by steaming the second primary extract, a partial aroma recovery from 20 to 60 95 of the total amount of the second primary extract is used, preferably from 20 to 40 95 aroma recovery is used, and the recovered aroma distillate is added to coffee concentrate after evaporation. 11. The method according to any of the previous items, where the content of dry matter in the concentrate after evaporation is in the range from 40 95 of the content of solid matter to 60 95 of the content of solid matter. 12. The method according to any of the preceding items, wherein the initial ratio of water to coffee is between 2.8 and 15, preferably between 3 and 10, preferably between 4.0 and 8.0. 13. The method according to any of the previous items, where the primary extraction is carried out using water as an extraction liquid at a temperature between 70 and 120 "C, preferably between 8519526. 14. The method according to any of the previous items, where the final solids content of the obtained coffee concentrates ranges from 25 to 35 wt. 95. 15. Coffee concentrate containing from 15 to 55% of dry solids, which is obtained by the method according to any of the previous items. 16. A coffee concentrate containing from 15 to 55 95 dry solids, characterized in that it has a flavor profile represented by the presence of 1-SOY,, dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy)-2-propanone, 2- heptanone and 4-ethylguaiacol, where the calculated value of the model of method M or 7 based on the analysis of individual least squares discriminants of the mentioned markers is higher than 0.5, preferably 0.55, best 0.6. 17. Coffee concentrate according to claim 16, characterized in that it contains 1-caffeylquinic acid lactone (1-SOY) in an amount of at least 450 mg of chlorogenic acid equivalents per kg of dry solids, preferably at least 510 mg, even better at least 590 mg. 18. Coffee concentrate according to claims 16 or 17, which is characterized by the fact that the sum of the concentrations expressed as mg of aroma/kg of soluble coffee solids of the aroma markers of dimethyl disulfide, furfuryl alcohol, 1-(acetyloxy)-2-propanone, 2-heptanone and 4-ethylguaiacol is greater than 2850 mg/kg of soluble substances (per year), preferably more than 3000 mg/kg per year. is m OH nm dk, ak Rahmeavonkh re KE san coffee and Windows yani PO Z y y "A EN Xia TOWER and dresses ezhaAAAHKM NK I ny shi 5 : ; I eat ! chinny I se sho pet cake Eat shi " and "vav MORE : t i Z i chene i Knyzhku uyu sk pi ini i Kai pi "konya Vinna det ozhny rik vyk E dekner and ZK NOVYN kava Doki MNN I Ko V Zoo X donna, y men nachis vi Y skit h or SHO z 5 Ж є є ! dream KK iden 3 nn KK nya